Aviation

Aviation

Dealing with vehicles or machines used in flight or propulsion through the air.

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Aviation > Powerplant

adiabatic change

Aviation; Aircraft maintenance

A physical change that takes place within a material in which heat energy is neither added to the material, nor taken away. If a container of gas is compressed, with no heat ...

permanent magnet

Aviation; Aircraft maintenance

A piece of hardened steel that has been exposed to a strong magnetizing force which has aligned the spin axes of the electrons surrounding its atoms. The high retentivity of the ...

semiconductor transducer

Aviation; Aircraft maintenance

A piezoelectric crystal that converts input energy of one form, such as pressure, into output energy of another, such as an electrical signal.

standpipe

Aviation; Aircraft maintenance

A pipe which protrudes upward from the base of an oil tank and through which oil used for normal engine lubrication is drawn. In the event of a catastrophic leak when all oil ...

rocker arm

Aviation; Aircraft maintenance

A pivoted arm on the cylinder head of a reciprocating engine. The pushrod forces one end of the rocker arm up, and as the other end moves down, it forces the poppet valve off of ...

thermosetting resin

Aviation; Aircraft maintenance

A plastic resin that, once it has been hardened by heat, cannot be softened by heating again.

stepping motor

Aviation; Aircraft maintenance

A precision electric motor whose output shaft position is changed in steps by pulses from the control device. Stepping motors can make high-torque changes in small angular ...